Hi Bug APL,

I am willing to admit that my syntax is actually incorrect,and would appreciate any help in that sense, but ,/Matrix works:
      A
1 2 1 2 1
2 1 2 1 2
1 2 1 2 1
2 1 2 1 2
1 2 1 2 1
      A,A
1 2 1 2 1 1 2 1 2 1
2 1 2 1 2 2 1 2 1 2
1 2 1 2 1 1 2 1 2 1
2 1 2 1 2 2 1 2 1 2
1 2 1 2 1 1 2 1 2 1
      A,[2]A
1 2 1 2 1 1 2 1 2 1
2 1 2 1 2 2 1 2 1 2
1 2 1 2 1 1 2 1 2 1
2 1 2 1 2 2 1 2 1 2
1 2 1 2 1 1 2 1 2 1
      ,/ A A
 1 2 1 2 1 1 2 1 2 1 
 2 1 2 1 2 2 1 2 1 2 
 1 2 1 2 1 1 2 1 2 1 
 2 1 2 1 2 2 1 2 1 2 
 1 2 1 2 1 1 2 1 2 1 
      ,[2]/A A
SYNTAX ERROR
      ,[2]/A A
      ^    ^

Even parenthesis don't work:

      (,[2])/A A
SYNTAX ERROR
      (,[2])/A A
      ^      ^
     

-Alex 

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